It's for science. I am so confused. Can someone help me out? Here's the first question:
___ Ca + ___ O2 ---> CaO
Ca = Ca =
O = O =
(The ____'s are blanks and the 2 is meant to be the, uh, "small two" Sorry I'm so untechnical.)
I'd love any help.
2007-09-29 16:47:16 · 5 answers · asked by Fuze 1 in Science & Mathematics ➔ Mathematics
4Ca+202---->4CaO
or
2Ca+02----->2CaO
2007-09-29 16:52:02 · answer #1 · answered by ptolemy862000 4 · 0⤊ 0⤋
Hi sir this is maths section. Ur question comes from Chemistry. PLs check it out.
Any way I think I can help u.
Ca+O2-->CaO
There are 2 Oxygen atoms in reactants so the products also must have 2 O atoms.
Ca+O2-->2CaO
Here again there are 2 Ca atoms in product so there must be 2 Ca atoms in reactants
2Ca+O2-->2CaO
Hence the equation is balanced.
2007-09-29 23:57:13 · answer #2 · answered by Sharon 2 · 0⤊ 0⤋
2Ca + O2 = 2CaO
start with two O's cause you know you have those. Then since you end up with CaO which has one O you know you need at least 2 of them, so you must also have 2 Ca.
If you understand fractions at all, try to think of the numbers as getting common denominators, it sometimes makes it easier to understand.
2007-09-29 23:56:53 · answer #3 · answered by enderbean 3 · 0⤊ 1⤋
2 Ca + O2 ---> 2Ca O
two moles of calcium combines with one mole of oxygen to
yield 2 moles of calcium oxide
2007-09-29 23:55:30 · answer #4 · answered by mohanrao d 7 · 0⤊ 0⤋
Dewd......... You need to go back, read and -study- that chemistry book, and learn all about oxidation levels, what they mean, and how to balance a simple redox equation.
Doug
2007-09-29 23:55:44 · answer #5 · answered by doug_donaghue 7 · 0⤊ 3⤋